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Library for various functional interface manipulations

There is a newer version: 1.0

package ru.argento.jfunction;

import java.util.Objects;

/**
 * Double precision floating point number function of integer argument.
 *
 * @param  Function result type.
 */
@FunctionalInterface
public interface IntToDouble
    extends ObjectToDouble
{
    /**
     * Apply the function.
     *
     * @param value Original value.
     * @return Result value.
     */
    double toDouble(int value);

    @Override
    default double toDouble(Integer value)
    {
        Objects.requireNonNull(value, "null_value");

        return toDouble(value);
    }
}